When you refer to working official, maybe you're referring to the a "stable" version because the code provide by the developer's github is considered official, also i guess that older versions still are able to sync. Between the 2 versions that you have pointed out that you have the version 1.4.17 is the latest stable version at the time that I wrote this, don't let the .7 fool you, that version is behind 10 versions from the lastest version. You can see in the quote below, there is a v1.4.18 but is not released as a Stable version yet, you need to build it if you need it and test it. For last in the link that says Release Repository you can check the releases chronology.